“What happens at the dealership needs to be the same on the web,” he says.

Car shoppers currently can do many things online. But Henahan describes an impending fully integrated system that lets them do much more in a seamless way.

That includes going to a dealership website to learn about specials, select a vehicle from listed inventory, receive a quote, get a trade-in offer (even though the dealership has not seen the car in question), establish credit, examine financing options and view finance and insurance products.

The system will remember what online shoppers have done “so they don’t have to start over” if they leave and later revisit the website, Henahan says.

Auto retailing is getting closer to a digital replication of dealership doings, he says. “The workflow is in play, but it is not yet integrated into a seamless experience.”

It soon will be.

“Much of this is in place,” says John Holt, senior vice president of ADP’s Digital Marketing Group. “We’re trying to bring it closer together. We want the online customer to do any part of the transaction they choose to do.”

All this “will transform the way cars are marketed and sold in the digital age,” Henahan says, estimating it will cut the buying time in half.